1568
Fig. 3. BS type 1-H prototype structure.
The obtained results show that the required spectral
efficiency for 5G BS can be obtained with a MIMO
configuration of more than 16x8. However with these types of
configuration, difficulties can arise at the receiving side for
64QAM and 256QAM modulations due to strong intersymbol
interference.
V. C
ONCLUSIONS
The paper presents a review of existing technical solutions
for fast prototyping of 5G base stations taking into account
parameters presented by 3GPP 38 series (Release 15) for the
physical layer implementation and includes a BS prototype
with 5G physical layer parameters on National Instruments
testbed.
Based on one of the architecture overview a MIMO system
simulation of the BS was carried out. The target parameters for
5G BS were achieved for MIMO 16x12 at 16QAM, 64QAM
and 256QAM, as well as at MIMO 16x8 for 64QAM and
256QAM. Since the experiment was conducted without a
composite antenna the results correspond to the output of the
transceiver unit array. To get a full operating BS type 1-H
prototype it is necessary to continue the study including the
development of a composite antenna.
The work was financially supported by the Ministry of
Science and Education of Russia (Grant No. 14.578.21.0249,
ID RFMEFI57817X0249).
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